A Witch and Her Dragon by Emberly Wyndham

His duty is to protect the princess, but his dragon’s desire to claim her is becoming impossible to ignore—and she’s about to uncover all the fiery secrets he’s been hiding.

Alina Ravenscroft has a plan: graduate from Coven Crest Academy, master her magic, and join the king’s powerful coven of witches. The only problem? The king is her grandfather, and he insists she can’t attend without a knight by her side. A bodyguard. A babysitter.
Raelan Ashvale is one of the king’s elite knights—and a secret dragon shifter. Raelan is assigned as Princess Alina’s personal guard. But there’s a catch: Alina is Raelan’s fated mate, and for the past three years, he’s been doing everything he can to ignore the overwhelming pull between them, the searing need to claim her and make her his own. He can’t afford to give in to his desire for her—especially when revealing the secret of his dragon could risk everything for Raelan and his family.
As Alina and Raelan are forced to spend more time together, the growing tension between them becomes impossible to ignore. Raelan has a duty to the king, to his family, and to his secret. But when danger draws closer and threats to Alina’s safety become all too real, Raelan will have to confront the dangerous truths about his dragon—and the powerful connection he shares with the princess.